Re: [DNSOP] Last Call: <draft-ietf-dnsop-refuse-any-07.txt> (Providing Minimal-Sized Responses to DNS Queries that have QTYPE=ANY) to Proposed Standard
Tony Finch <dot@dotat.at> Tue, 21 August 2018 19:31 UTC
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Date: Tue, 21 Aug 2018 20:31:50 +0100
From: Tony Finch <dot@dotat.at>
To: Paul Wouters <paul@nohats.ca>
cc: Ólafur Guðmundsson <olafur=40cloudflare.com@dmarc.ietf.org>, draft-ietf-dnsop-refuse-any@ietf.org, Ted Hardie <ted.ietf@gmail.com>, dnsop-chairs <dnsop-chairs@ietf.org>, dnsop <dnsop@ietf.org>, IETF <ietf@ietf.org>
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Subject: Re: [DNSOP] Last Call: <draft-ietf-dnsop-refuse-any-07.txt> (Providing Minimal-Sized Responses to DNS Queries that have QTYPE=ANY) to Proposed Standard
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Paul Wouters <paul@nohats.ca> wrote: > On Tue, 21 Aug 2018, Ólafur Guðmundsson wrote: > > > Ted, Would it be acceptable to just do > > s/TCP/Connection oriented Transport/ > > For RFC 7901 we used "source-IP-verified transport" I don't think that's a good idea, because it suggests oversised responses over UDP with cookies. I wanted minimal-any in order to reduce both UDP fragmentation and fallback to TCP for all UDP queries from legitimate clients. (Spoofed queries are dealt with by RRL.) I suggest: 4.4. Behaviour over different DNS transports A DNS responder MAY behave differently when processing ANY queries received over different DNS transports or with different levels of client authentication, e.g. by providing a conventional ANY response over TCP whilst using one of the other mechanisms specified in this document in the case where a query was received using UDP. Implementers SHOULD provide configuration options to allow operators to specify different behaviour over different DNS transports or for authenticated clients. (the TCP/UDP e.g. is just a non-normative example; more outre transports and options are covered by the normative text) Tony. -- f.anthony.n.finch <dot@dotat.at> http://dotat.at/ Bailey: Northwest 5 or 6, backing west 5 to 7. Moderate or rough. Showers. Good.
- [DNSOP] Last Call: <draft-ietf-dnsop-refuse-any-0… The IESG
- Re: [DNSOP] Last Call: <draft-ietf-dnsop-refuse-a… Ted Hardie
- Re: [DNSOP] Last Call: <draft-ietf-dnsop-refuse-a… Ólafur Guðmundsson
- Re: [DNSOP] Last Call: <draft-ietf-dnsop-refuse-a… Paul Wouters
- Re: [DNSOP] Last Call: <draft-ietf-dnsop-refuse-a… Ted Hardie
- Re: [DNSOP] Last Call: <draft-ietf-dnsop-refuse-a… Bob Harold
- Re: [DNSOP] Last Call: <draft-ietf-dnsop-refuse-a… Tony Finch